Using Plants in the Landscape

Section 7

Annual Bedding Plants

Unit 25

Objectives

• Identify four uses of annual flowers• Design a bed layout using annual flowers• Explain the steps in preparing the soil for

annual flowers• List the six steps in the aftercare of annual

flowers• Demonstrate proper transplanting

techniques for annual flowers

General Info

• Annuals are plants that complete their life cycle in 1 year– Starts from seeds, grows blooms, sets seed, and

dies in 1 season

• Flowering plants are more often used in landscapes

• The market for annual bedding plants has grown in the last 10 years

Flowering Annuals

• Create a colorful landscape– Figure 25-2

• Flowering annuals are used to…• Provide a mass of color around a house foundation in flower beds,

or in front of evergreens• Fill spaces between shrub plantings or other perennials and give

color when these plants are not blooming• Provide color in bulb beds after the bulbs have bloomed• Supply cut flowers• Plant along fences or walks• Create seasonal color

Selecting Flowering Annuals

• First consider the purpose of the plant and where it is to be planted– Consider height

• Select plants w/ colors that will blend in well with one another

Planting Hanging Baskets

• Baskets range from 4 to 14 inches

• Must have adequate drainage holes

• Plant 1 less plant than the size of pot– Ex. In an 8” pot, plant 6 annuals around the

outside of the basket and 1 in the center

Planning and Designing a Flower Bed

• Flower beds range in size and design according to individual needs and preferences– Figure 25-6

Preparing the Soil

• Prepare soil in the fall

• Don’t let bed dry out completely when dug

• Before preparing new beds, test the soil for drainage– Dig a 10” hole and fill it w/ water; fill again the

2nd day, if all water is not gone w/in 10 hrs on the 2nd day, drainage is a problem

Seeding

• Most annuals are seeded indoors• Plants are set outside in the flower bed as soon as

the danger of frost has passed• Plants that can be seeded outdoors should be sown

as early in spring as possible• Soil should be 60 degrees before setting plants

outdoors• Plant seedlings at about the same depth as they

were in starting container

Perennials, Ornamentals Grass, Vines, Bamboo,

and Prairie Gardens

Unit 26

Perennials

• Perennials are plants that live from year to year and do not require replanting

• Some bloom in 1st year but most produce larger more attractive flowers and develop stronger root systems

• Demand for perennials has expanded due to the growing public interest in gardening and landscaping and desire for plants that come back every year

Perennial Beds and Location

• Bed should 1st be designed on paper to fit the garden area

• Guidelines: p. 276• Use and island bed w/ an informal-shaped

border, surrounded with a lawn area• Use a perennial border planted along a fence or

property line as a divider• Be sure to consider all factors; soil, light, and view

Selection

• Should be selected by personal preference, color scheme, texture, shape, growth habit and the microclimate of the area

• Ask advice from a professional

• Mass plants in groups of 3, 5, 9, or more for a full appearance

Designing a Perennial Garden

• Consider; Soil, time of blooming, and space

• Have a plant list including the colors and varieties best suited

Soil Prep and Fertilizing

• Perennials live in the same soil for years so soil prep is important

• Organic matter and drainage are important

• Fertilizer should be dug in at 1 foot deep

Mulching

• Creates aesthetics that enhance the perennials

• Source of organic matter

• Helps control weeds

• Conserves moisture

• Promotes even ground temps

Ornamental grasses

• Excellent for use as accents and make attractive edging

Vines

• Used to mask various landscape features and create a flowing effect throughout the garden

• Soften the appearance of walls, fences, porches, etc.

• Effective where space is limited

Prairie Gardening

• Natives, annuals, biennials and perennials are used

• Prairie Plants are grown informally in a meadow environment

• Attract butterflies, songbirds and other wildlife

• Special seed mixes are available

Narrowleaf Evergreens

Unit 27

Objectives

• Identify and plant narrowleaf evergreens in the landscape• Differentiate between the 2 types of narrowleaf evergreen

leaves• List 4 reasons for using narrowleaf evergreens in the landscape• Describe the primary purpose of a lath house• Describe the proper fertilizer practices for narrowleaf

evergreens• Demonstrate the proper procedure for planting narrowleaf

evergreens• Calculate fertilizer’s 3 active ingredients of nitrogen,

phosphorus, and potassium

General Info

• Narrowleaf Evergreens are a popular landscape plant because they remain green year-round

• Adaptable to various soil types and weather

• Leaves can be needlelike or scale like

Uses

• Standard choice for foundation plantings because of year-round green foliage

• Also boundary plants to accent borderlines of property

• Also used to screen a view of a less attractive area or

• Control air currents

Care

• Narrowleaf evergreens are grown in nurseries• They are shipped 3 diff. Ways

– Bare root (BR)• Shipped while seedlings

– Balled and Burlapped (B&B)• May be moved at almost any time of the year, except when plant has

shoots or few growth or when ground is frozen

– As Container Stock (C)

• To maintain healthy plants, they should be watered regularly and stored in a lath house– Lath house gives protection from sun to control transpiration

Planting Balled and Burlapped Plants

• Holes should be 1 ½ to 2 times as large as the ball of soil

• Ball of tree is set 1” above soil line • Add prepared soil in and around the root

ball until covered• When hole is 2/3 filled w/ soil, fill it w/

water and let it soak• Finish filling the hole

Planting containerized trees

• Planted the same as balled and burlapped trees except…

• 1) Container is removed from tree roots• 2) after container is removed, check if the

roots are pot-bound, if yes, it is necessary to cut the roots to encourage growth– Pot-bound: the root ball will be excessively

tight

Staking

• Staking evergreens is important because it gives the tree needed support to allow the root system to become established

• A 10’ tree should be staked using 2- 5’-6’ stakes that can stay in the ground for 2 years

Fertilizing

• Fertilize 3-6 pounds of 5-10-10 per 100 square ft placed in a circle under the drip line at the outer end of the branches

• Do so before new growth starts in the spring

• After applying fertilizer, water w/ a garden hose sprinkler

Watering

• Need to be watered every 10 to 14 days during the 1st year

Pruning

• Pruning individual branches give a natural informal appearance

• Shearing is done as when shaping a hedge– Ends of all small branches are clipped to shape

the edges of the plant in straight lines

Characteristics Listed on Landscaping Lists

• Trees on lists are listed according to height

• Hardiness – Indicates where plant can be grown in the US

• Foliage color – color of the plant– Vary from light to dark green

• Period of interest – time of year which plant is most attractive

List (cont’)

• Landscape use – indicates how a particular plant is used in the landscape– Ground cover – refers to plants that are used to cover the

ground (prevent erosion)– Foundation planting – refers to plants that are used around

buildings to help accent the buildings– Rock Garden – refers to plants used in gardens in a rocky

environment– Specimen plants – refer to plants that are used alone for

their own beauty– Screen plant an hedges – refer to plants that confine certain

areas

Broadleaf Evergreens

Unit 28

Objectives

• To identify the cultural requirements, planting techniques, care, and uses of broadleaf evergreens in the landscape

• List 4 ways in which broadleaf evergreens are used in the landscape

• List 4 cultural requirements of broadleaf evergreens• Describe the soil and fertilizer requirements of broadleaf

evergreens• Explain the procedure for transplanting broadleaf

evergreens• List 3 pests that attack broadleaf evergreens and 1 control

for each

Description

• Evergreen plants (hold leaves all year) with broad leaves rather than needlelike

Uses of Broadleaf Evergreens

• Around foundations– Smaller-leaved evergreens

• As Specimen plants– Individual plant, not massed

• As hedges• Along Sidewalks

– Lead the way to a home entrance

• In woodland plantings

Cultural requirements

• Ample moisture– Organic matter holds moisture

• Good soil drainage– Planting can be raised above soil level

• Mulching– Hold proper supply of moisture– Frozen soil cannot allow roots to pick up

moisture

Cultural Requirements (Cont’)

• A location that is sheltered from strong winds– Cold winds and winter sun do the most damage

by removing moisture

• Enough Sunlight– Plants grow tall and leggy w/ too much shade– If plants do not flower well, they are probably

getting too much shade

Soil and Fertilizer

• Any good loam soil is satisfactory for most broadleaf evergreens

• Acidic soil is best

• Use fertilizer in small amounts

• Add fertilizer in the spring

Transplanting

• Roots must always be in close contact with moist soil

• Evergreens are moved with the root ball– Soil is left intact around the roots and moved with the

plant

• 12-18 inches should be spaced around the root ball• Planted at same depth or higher than were growing

before• No soil on top of root ball• Do not pack the soil but water gently

Pruning

• May be pruned for special effect or cut back to thicken the plant

• Done in early spring or just after blooming

Insects and Diseases

• Insects are rarely a problem

• Fungus diseases cause the most damage

• Use a spreader sticker to apply all sprays– Chemical added to a pesticide that causes the

spray to break into small droplets and spread evenly

Deciduous Trees

Unit 29

Objectives

• To properly position and plant deciduous trees in the landscape

• List the 6 functions of trees in the landscape• Select at least 2 specific trees to fulfill each

of these six functions demonstrate the proper planting technique for bare root, balled and burlapped, and containerized trees

Uses of Trees in the Landscape

• Usually serve a specific purpose in the landscape• To provide shade – keep temps inside houses

cooler in summer and provide outdoor shade– Can reduce summer indoor temps as much as 20

degrees

• To frame the house – make the house the center of attention

• To soften lines – placed at the back of a home

Cont’

• Ro relieve bare spots – end walls of houses• To screen an object – block the view of an object• To frame a view – tall trees w/ underplantings or

small trees• To ensure privacy – • To accent the landscape – flowering trees• To break monotony – should be placed off center

as to not make it appear cut in half• As windbreaks – tall evergreens

Tree Types

• Figure 29-11 lists deciduous trees

• Grouped according to height

• Classified according to characteristics– Form, Flowering, Color, Texture, How to

propagate, Height, Hardiness, and Ornamental use

Classification

• Form – shape of the tree• Flowering and Color – if and when tree

flowers and color of the blossoms• Texture – size of the leaves

– Large leaves – coarse texture/creates boldness– Small leaves – fine texture/ refinement

• How to propagate – way a tree is reproduced

Classifications (cont’)

• Height – average height the tree grows

• Hardiness – ability of the tree to live in a particular climate zone– Influenced by temp, rainfall, and soil

• Ornamental use – common uses of the tree in the landscape

Purchasing Deciduous Trees

• Trees can be purchased in 3 forms

• Bare Root (BR)

• Balled and Burlapped (B&B)

• Containerized (C)

Fertilizing

• Slow release fertilizer is recommended

• Otherwise drill holes around the drip line of the tree and apply directly into the holes then fill the holes

Mulching

• Needed for moisture retention, weed control, supplying organic matter, and moderating temp

• Also improves the aesthetics of the area

• Keep mulch away from tree trunk

• Apply mulch 2/3 the distance from tree trunk to drip line

Aftercare

• Water during dry conditions especially during 1st year

• Never less than 1” of water at a time– Sufficient for 1 week

Deciduous Shrubs

Unit 30

Objective

• To select, use, and care for deciduous shrubs• Identify at least 5 deciduous shrubs• List at least 2 uses of deciduous shrubs in the

landscape• Explain the 3 ways deciduous shrubs are

purchased• Outline the planting procedure for deciduous

shrubs

Uses in the Landscape

• Deciduous Shrubs are used widely in the landscape to form borders, screens, background plantings, and foundation plantings

• Selected for effects created by flower color, form, fruit, color and shape of stem, and color and height of foliage

Factors to Consider

• Period of Interest– Time of year which plant materials create the

most interest in the landscape

• Foliage• Height• Hardiness

– Low minimum temperature the plant can endure

Purchasing Plants

• BR

• B&B

• C

Planting time

• Best time to plant BR is when in dormant stage

• B&B and C may be transplanted any time during the growing season – usually fall or early spring

Planting Site

• Well-drained soil

• Site is important since deciduous shrubs are long-lived plants

• May be fertilized in the spring

• Holes for B&B and C plants should be 3 times larger in diameter than root balls

Care of the plant

• Bacteria and Fungi cause the most diseases

• Pruning is used to thin out old or dead wood, to shade plants, and control plant size

Rules for Pruning

1. Shrubs that bloom on wood grown the previous season should be pruned immediately after flowering

2. Bloom on current year’s growth pruned in fall or early spring

3. Some shrubs require annual pruning to thin out old wood

4. If shoots or suckers are sent up from roots or base some of them should be removed so growth doesn’t become too thick

Ground Covers

Unit 31

Definition

• Ground Covers are low-growing plants that cover the ground in place of turf

• Fill in bare spots in landscapes

• Help prevent erosion

• Fill in shady areas under trees

Types of Ground Covers

• 3 types

• Broadleaf evergreens – retain leaves year-round

• Deciduous plants – lose leaves

• Narrowleaf evergreens – needlelike leaves that retain color year-round

Uses

• Can be used in areas where soil is not suitable for grass

• Also used for beauty they contribute

• Make great foreground plantings

• Also used between evergreens to keep soil cool and shade roots or other plants

Questions before Selection

• In what type of soil does the plant grow best?• Is it suitable for the locality?• How is it propagated?• How long will it take for the plants to cover the

area in which they are planted?• What is the mature height of the plant?• Are diseases and insects a problem?• How expensive are the plants?

Planting Ground Covers

• Spaced according to size, growth rate, and time allowed for plants to spread

Caring for Ground Covers:Fertilizing

• Fertilizer should be applied only as needed to keep plant healthy

• Can be applied as a dry granular fertilizer or a soluble fertilizer

Pruning

• Necessary only to confine the plant to the area it is desired

Watering

• Water as needed during the 1st year– Anytime the soil becomes dry or plants start to

wilt, apply at least 1 inch of water

Controlling Insects and Diseases

• Rarely a serious problem

Bulbs

Unit 32

Objectives

• List 4 uses of bulbs in the landscape• Describe the soil and fertilizer used in the

flowering of bulbs• Explain how planting depth and spacing of

bulbs are determined• Describe how to care for bulbs after they

have flowered• List the steps in the forcing of bulbs

Bulbs

• Word used to refer to bulbs, corms, tubers, and rhizomes– All are structures containing an embryonic

plant and the necessary stored food for plant growth

Uses Of Bulbs in the Landscape

• Bulbs are most striking when they form a massing (grouping of color)

• Not attractive in thin rows

• In wooded areas – bulbs grow well

• Some grow well w/ evergreen groundcover

More Uses

• Rock gardens are excellent places t use flowering bulbs

• Using color masses throughout the garden accents the areas in which they are planted

• Flowering bulbs are used to add color around evergreen shrubs

• Also used as cut flowers

Soils

• Bulbs grow well in well-drained loamy soils

• Soil should be a neutral pH (6.0)

Planting Bulbs

• Some are planted in the fall and some in the spring

• Each bulb has a recommended planting depth and spacing– Showy bed = bulbs closer spacing

• Bulbs are usually placed the same distance apart as the planting depth

Fertilizing Bulbs

• Fertilized when planted by digging fertilizer into bottom of the bed– Cover w/ 1” of soil before planting

• After planting and covering w/ 2” of soil, use special bulb food and then cover completely

• Each spring a light application of complete bulb food (N-P-K) should be added– 5 pounds of 5-10-5 per 100 square feet

Care After Flowering

• Bulbs should be dug up, thinned and replanted occasionally

• Some are done annually, other 3-5 years• When digging, use a nursery spade to

gently remove the bulb & store at 50 degrees in a dim light

• Dust w/ a pesticide to prevent insects, rodents, and diseases

Forcing Bulbs

Forcing plants to flower at other than their normal season

1. Identify bulbs to use for forcing- select large bulbs

2. Select a well-drained potting medium high in organic matter

3. Place drainage material in the bottom of the pot4. Place a layer of the medium in the pot, set the

bulb in and fill in around the bulb with the growing medium so top is exposed

Forcing Bulbs (cont’)

5. Water by setting the pot in a pan of water6. Be sure to label the pot correctly 7. Set the planted pot outside in a cold frame at a

temp. of 50 from Nov 25 until Jan 158. Remove the pot from the cold frame and place in

the greenhouse - check for root development

9. Tulips bloom 5 weeks from removal from cold frame. Other plants may require more or less time

More on Bulbs

• Always plant bulbs at the depth prescribed – Never plant in shallow soil

• Always plant in a well-drained soil

• Provide protection from mice

• All bulbs have planting instructions supplied – be sure to follow directions